TABLE 1—

Odds Ratios for Reported Symptoms: North Orange County and Santa Cruz County, 1998 and 1999

	1998 (El Niño Winter)		1999 (La Niña Winter)
	OR	95% CI	OR	95% CI
Any symptom	1.85	1.36, 2.52	1.17	0.87, 1.57
SRD	1.29	0.91, 1.82	0.75	0.53, 1.05
HCGI	2.32	1.27, 4.25	0.97	0.62, 1.51
Fever	1.63	1.08, 2.44	0.89	0.61, 1.28
Nausea	1.18	0.74, 1.90	0.89	0.58, 1.36
Stomach pain	2.51	1.45, 4.32	0.90	0.60, 1.37
Vomiting	2.13	0.95, 4.78	0.84	0.46, 1.53
Diarrhea	2.10	1.33, 3.31	1.06	0.69, 1.63
Sinus problems	1.41	1.05, 1.91	1.25	0.93, 1.68
Cough	1.36	0.96, 1.91	1.10	0.80, 1.51
Phlegm	1.33	0.92, 1.92	0.52	0.35, 0.76
Sore throat	1.96	1.42, 2.70	1.55	1.13, 2.14
Eye redness	2.44	1.20, 4.93	1.42	0.60, 3.33
Ear pain	1.36	0.89, 2.09	1.55	0.98, 2.46
Skin infection	1.93	1.12, 3.33	0.71	0.42, 1.21

Note. Odds ratios (ORs) were adjusted for water exposure, gender, age, occupation, education, income, political outlook, and level of concern about coastal water quality. CI = confidence interval; SRD = significant respiratory disease (fever and sinus problems, fever and sore throat, or cough and phlegm); HCGI = highly credible gastrointestinal illness (vomiting, diarrhea and fever, or stomach pain and fever).